The Qweak experiment has recently completed data-taking at Jefferson Lab. The primary focus of the experiment is to perform a precision measurement of the proton's neutral weak charge. The Standard Model gives a definite prediction for the weak charge. Any deviation from that can be interpreted as evidence for new physics beyond the Standard Model. This precision, low energy measurement is sensitive to new physics signatures at energy scales up to 2 TeV. The experiment measures the parity-violating asymmetry in the scattering of 1.165 GeV longitudinally polarized electrons on the proton at low momentum transfer (Q2 ∼ 0.025 (GeV/c)2). This paper provides a brief status report on the experiment with a focus on instrumentation and techniques that are applicable to lower beam energy realizations of parity-violating electron scattering measurements. Estimates of anticipated errors on the proton's weak charge expected if the Qweak apparatus were used at a lower beam energy are also discussed.
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7 November 2013
WORKSHOP TO EXPLORE PHYSICS OPPORTUNITIES WITH INTENSE, POLARIZED ELECTRON BEAMS AT 50-300 MEV
14–16 March 2013
Cambridge, Massachusetts, USA
Research Article|
November 07 2013
Qweak experiment update and applications/opportunities at lower energies Available to Purchase
Mark L. Pitt;
Mark L. Pitt
Center for Neutrino Physics and Department of Physics, Virginia Tech, Blacksburg, VA 24061,
USA
Search for other works by this author on:
Qweak Collaboration
Qweak Collaboration
Center for Neutrino Physics and Department of Physics, Virginia Tech, Blacksburg, VA 24061,
USA
Search for other works by this author on:
Mark L. Pitt
Center for Neutrino Physics and Department of Physics, Virginia Tech, Blacksburg, VA 24061,
USA
Qweak Collaboration
Center for Neutrino Physics and Department of Physics, Virginia Tech, Blacksburg, VA 24061,
USA
AIP Conf. Proc. 1563, 106–109 (2013)
Citation
Mark L. Pitt, Qweak Collaboration; Qweak experiment update and applications/opportunities at lower energies. AIP Conf. Proc. 7 November 2013; 1563 (1): 106–109. https://doi.org/10.1063/1.4829386
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